Apparatus for forming cores.



N0. 799,847. PATENTED SEPT. 19, 1905.

' J. P. HAY.

APPARATUS FOR FORMING GORBS.

APPLICATION FILED OCT. 17,1904.

UNITED STATES PATENT OFFICE.

JOHN F. HAY, OF ERIE, PENNSYLVANIA, ASSIGNOR TO ERIE MALLEABLE IRONCOMPANY, OF ERIE, PENNSYLVANIA, A CORPORATION.

APPARATUS FOR FORMING CORES.

Specification of Letters Patent.

Patented Sept. 19, 1905.

To all whom it may concern:

Be it known that I, JOHN F. HAY, a citizen of the United States,residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented new and useful Improvements in Apparatuses for Forming Cores,of which the following is a Specification.

This invention relates to apparatuses for forming cores; and it consistsin certain improvements in construction thereof, as will be hereinafterfully described, and pointed out in the claims.

The purpose of the invention is to provide an apparatus by which a coremay be readily formed, having chills so arranged in the core as toprevent the formation of defects in the castings for which the cores areused.

Great difficulty has heretofore been encountered in casting coredarticles having angles, especially where the casting is of iron fromwhich malleableiron is formed. This is particularly true in that classof castings known as pipe-fittings, such as Ts and elbows. With suchcastings difficulty has been encountered at the angle where defects areapt to occur, producing weakness and in many cases forming minuteopenings through the walls of the fittings, so as to render thempractically useess.

Among the objects of the invention is to form a core apparatus by whicha core may be so provided with chills as to obviate these difficulties.

The invention is illustrated in the accompanying drawings, as follows:Figure 1 shows a plan view of one half of the core-box with theapparatus in place therein ready to be inserted in the material in thebox; Fig. 2, a plan view of the other half of the core-box with thechill and follower in the position assumed after the chill has beenforced to position; Fig. 3, a plan view of a finished core; Fig. 4, asection on the line 4: 4.

The apparatus shown is designed to form the core for a T and comprisesthe core-box A, having the main passage a and cross-passage a. The partsof the core-box are brought into register by the usual dowels a enteringthe perforations a. The angles have the filling A. Openings a areextended through this filled-in portion to the apex of the angle. 7 Achill B, preferably pointed, is dropped into the openings a andforcedinto the material forming the core by a follower G. In the ordinaryformation of the core the core material will be placed in the box in theusual manner. The chill B is then forced into the core by the use of thefollower O. The material forming the core need not be completely rammedprior to the insertion of the chill. 6

A stop 0 is preferably provided so that the end of the follower willbring the surface of the chill just flush with the surface of the core.

By making the opening a of greater length than thechill the chill may bedropped into it and the follower readily brought into place in theopening, the opening forming a guide for the chill and follower,-through which the chill may be inserted through the action of thefollower.

What I claim as new is 1. In an apparatus for forming cores, a coreboxhaving an opening through the walls thereof at a point corresponding tothe point of stress in the resulting casting for the insertion ofchills.

2. In an apparatus for forming cores, a corebox for forming articleshaving an angle, said box having an opening through its walls at theangle for the insertion of the chill.

3. In an apparatus for forming cores, a coreboxhaving an opening throughthe wallsthereof at a point corresponding to the point of stress in theresulting casting for the insertion of a chill, said opening havinggreater length than cross dimension.

4. In an apparatus for forming cores, the

said opening to force a chill into the materialin the box, said followerbeing provided with a stop to limit its inward movement to bring its endflush with the inner surface of the box.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JOHN F. HAY.

Witnesses:

C. D. HIGBY,

B. J. WALKER.

